| Dr. Sixian Cheng Welch is a Texas state licensed medical doctor, specializing in Internal Medicine. Graduated Magna Cum Laude from UNTHSC Texas College of Osteopathic Medicine, completed residency training in UTMB Hospitals, Dr. Welch currently is working at Baylor Scott and White Health, located in 810 W. Highway 71 Marble Falls TX 78654 | |||